Question

A b c = nr consecutive
a• b = ?
a•b•c = ?
A+ B + c = ?
Dau coroana!!!

Answer 1

Răspuns:

Explicație pas cu pas:

daca a, b, c sunt numere consecutive

atunci:

a = b - 1

c = b + 1

⇒

$a*b = (b - 1)*b = b^{2} - b$

$a*b*c = (b-1)*b*(b+1)=b*(b-1)*(b+1) = b*(b^{2} - 1 ) = b^{3} - b$

$a+b+c = (b-1)+b+(b+1) = 3b$

Answer 2

a=a

b=a+1

c=a+2

a) a×b=a*(a+1)=a²+a

b) a×b×c=a(a+1)(a+2)=a³+3a²+2a

c) a+b+c=a+a+1+a+2=3a+3=3(a+1)